叔父さん

1. Origins, structure, and basic meaning

• Structure: 叔父さん is read as おじさん and is a familiar or polite family term for an uncle who is a parent's younger brother.
• Basic usage: Mark the uncle as the subject in 叔父さんが来る and as the person asked or listened to in 叔父さんに聞く.

2. Common pitfalls and similar expressions

• Written form and relationship
  • The spelling 叔父 identifies a male sibling younger than the parent, and さん adds familiar respect to the address or reference.
• Reading に聞く
  • In 叔父さんに話を聞く, に marks the person from whom information is sought, while 父の話 supplies the topic.